<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div>
    <a href="#/home">home</a>
    <a href="#/about">about</a>
    <div class="container">default</div>
  </div>

  <script>
    const $container = document.querySelector('.container')
    window.addEventListener('hashchange', () => {
      // console.log(location.hash);
      switch (location.hash) {
        case "#/home":
          $container.innerHTML = "hello the home"
          break
        case "#/about":
          $container.innerHTML = "hello the about"
          break
        default:
          $container.innerHTML = "default"
      }
    })
  </script>
</body>

</html>